Men can disappoint you. In fact, I should say with considered authority that they will disappoint you. These streets are littered with evidence of some of the finest of women reeling from disappointment occasioned by these male beings.
Not that they have any sensible justification, in fact, to a large extent they have no idea what they are doing but for the fact that they extracted some momentary pleasure in the pseudo-engagement. They will swear in the name of their mothers that it has nothing to do with love.